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by BlastRoom
Practice reading element symbols and simple formulas to count atoms.
#formulas#us_grade_6_science
40 questions
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A lab card lists water as H2O. The small 2 is after H. How many hydrogen atoms are in one molecule of water, H2O?
A label shows carbon dioxide as CO2. The subscript 2 follows O, not C. How many oxygen atoms are in one molecule of carbon dioxide, CO2?
Methane is written CH4. A student says the 4 counts all the atoms. How many hydrogen atoms are in one molecule of methane, CH4?
Glucose is written C6H12O6. In one molecule of glucose, how many carbon atoms are shown by C6?
Oxygen gas is written O2. How many total atoms are in one molecule of oxygen gas, O2?
Two molecules of water are written 2H2O. The 2 in front multiplies the whole formula. How many oxygen atoms are in 2H2O?
Three molecules of carbon dioxide are written 3CO2. The 3 multiplies the whole formula. How many oxygen atoms are in 3CO2?
One molecule of glucose is C6H12O6. Counting all shown atoms, what is the total number of atoms in C6H12O6?
Water is written H2O. What element does the symbol O name in this formula?
A student writes the element carbon in a formula. What symbol should the student use for carbon?
On a salt label, table salt is NaCl. What element is represented by Na?
In the formula NaCl, what symbol represents chlorine?
A student writes chlorine as CL. Why should it be written Cl instead?
A cereal box lists the element iron. Which symbol stands for iron in a formula?
A substance is made of two hydrogen atoms bonded with one oxygen atom. What simple formula represents this substance?
A gas is described as one carbon atom with two oxygen atoms in each molecule. What formula matches that description?
A sample is table salt, described by one sodium atom and one chlorine atom together. What formula matches table salt?
A student describes methane as one carbon atom and four hydrogen atoms, but writes C4H. What is wrong with C4H?
Oxygen gas molecules have two oxygen atoms bonded together. What simple formula represents oxygen gas?
A student describes glucose as six carbon, twelve hydrogen, and six oxygen atoms, then writes C6HO6. What is missing from C6HO6?
Methane is written CH4. Counting every atom shown, what is the total number of atoms in one molecule of methane?
A nutrition chart writes glucose as C6H12O6. How many hydrogen atoms are shown in one molecule of glucose?
Table salt is written NaCl. Neither symbol carries a subscript. How many atoms are shown in one unit of NaCl?
A teacher writes 2CH4 on the board and says the 2 in front multiplies the whole formula. How many hydrogen atoms are in 2CH4?
A gas cylinder label reads 2CO2. Counting every atom, how many atoms are shown altogether in 2CO2?
A storage jar is labeled 2NaCl. How many chlorine atoms does 2NaCl represent?
Glucose is written C6H12O6. How many different elements does this formula name?
A cylinder of oxygen gas is marked 3O2. How many oxygen atoms does 3O2 represent?
A class chart lists the element hydrogen. What symbol should be written for hydrogen in a formula?
A gas cylinder is labeled N2. What element does the symbol N name in this formula?
In a notebook, a student writes the element chlorine as cl with a small first letter. Why is cl not a correct symbol?
A poster shows CO beside Co. Why do these two stand for different things?
A lab card lists four formulas. Which formula is made of atoms of only one element?
A milk label lists the element calcium. Which symbol correctly represents calcium in a formula?
A substance is described as one carbon atom bonded with four hydrogen atoms. Which formula represents that substance?
A student writes water as H2O2. What does H2O2 claim that water does not?
A worksheet asks for two molecules of carbon dioxide written as a formula. Which way of writing it is correct?
A sugar is described as six carbon atoms, twelve hydrogen atoms and six oxygen atoms in each molecule. Which formula matches that description?
On a homework sheet, table salt is written Na2Cl instead of NaCl. What does Na2Cl claim that NaCl does not?
One student writes methane as CH4 and another writes it as C1H4. Why is the 1 left out of CH4?
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20 questions
